* buildscripts/lilypond.words.py: remove.

    * buildscripts/lilypond.words.py: remove.
        * buildscripts/lilypond-words.py: add new, renamed file.
        Give generated targets and dirs explicitly in arguments.

        * GNUmakefile.in, elisp/GNUmakefile, elisp/lilypond-init.el,
        elisp/lilypond-mode.el, vim/lilypond-ftplugin.vim,
        vim/lilypond-syntax.vim: update to use new lilypond-words.py.

        * config.make.in: give '/usr/share/vim' explicitly as $(vimdir).

        * vim/GNUmake use --words and --vim targets in lilypond-words.py